Mistake made by the soccer people last month (5)
I believe the answer is:
fault
'mistake' is the definition.
(I know that mistake can be written as fault)
'by the soccer people last month' is the wordplay.
'by' is a charade indicator (letters next to each other).
'the soccer people' becomes 'fa' (I can't justify this - if you can you should believe this answer much more).
'last month' becomes 'ult' (short for 'last month' in correspondence).
'fa' next to 'ult' is 'FAULT'.
'made' acts as a link.
Can you help me to learn more?
(Other definitions for fault that I've seen before include "Defect; culpability" , "Defect, mistake" , "Shortcoming" , "An incorrect serve in tennis" , "Blame" .)